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New world record with an electric racing car: From 0 to 100 in 0.956 seconds

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Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#191

Post by epolanski »

HPsquared wrote: post #104
underlines wrote: post #91

Earlier quoted context omitted.

radicalbyte, you're absolutely right that the use of fans in Micromouse increases the traction, and therefore the speed at which the maze is solved. Suction allows for impressive performances. However, a small caveat that might be worth considering is that while the suction indeed increases speed, it might be more accurate to say that it primarily improves acceleration instead of car speed: The issue often lies with…

Speed = ∫(acceleration) dt

Exactly, thus you can simply integrate over a longer time span.

But if you want to increase the acceleration you need traction, your tyres need to be glued to the asphalt. Since you don't have aerodynamic pressure at those speeds you need to suck the vehicle to the ground.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#192

Post by ryukoposting »

emmelaich wrote: post #174
bborud wrote: post #74

Earlier quoted context omitted.

Then there's the Brabham BT46 "Fan car" that actually raced in F1. Once. Before it was banned. :-) https://youtu.be/B294RfWj1QE?si=jxYpIgwtH44at6Bq

Huh the Nick Mason credited with being a McLaren F1 owner is the drummer from Pink Floyd.

Suddenly I remember a Top Gear episode where Nick Mason drops off his F1 (maybe it was a Ferrari Enzo?) at the test track, then his personal helicopter lands on the strip, picks him up, and flies him out of the scene, all while "Money" by Pink Floyd plays in the background.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#193

Post by epolanski »

js2 wrote: post #68

Impressive but for reference, about half the acceleration of a Top Fuel dragster, which are also still getting faster. Here's Brittany Force who holds the current records (fastest time, fastest speed): https://www.nhra.com/news/2022/brittany-force-sets-national-... 0 to 338.43 mph in 3.665 seconds over 1000 feet. (The cars got too fast for 1,320 feet and have been racing 1000 feet since 2008.)

Aren't electric cars bound to beat any dragster car eventually? You get max torque instantly.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#194

Post by namdnay »

londons_explore wrote: post #76

I think hub motors like this are the future. Frees up space under the car for more battery. Removes the complexity of drive shafts and universal joints. Gives software full traction control. Reduces design time for new vehicles (just route a power and data cable to a wheel and you have a vehicle). Is the first step to all-electric braking. The downside is more unsprung mass. But modern motors are getting lighter and…

Modern motors get lighter in part because they can offer lower torque with a smaller rotor but compensate with higher rpm. That’s not possible for a hub motor

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#195

Post by papa-whisky »

m463 wrote: post #164
semanticc wrote: post #139

Earlier quoted context omitted.

I was sure you made a typo and meant 10000 feet, instead of 1000. But after checking, yeah, it makes sense to make the track shorter to avoid the cars reaching even more insane speeds.

they've been playing this trick with top-fuel dragsters for decades - the "speed" was measured far before the end of the course. I think it was to keep the speeds below 300mph to help with track insurance.

I don't think it's a "trick", it's purely for safety reasons. The distance change was made following a fatal crash.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#196

Post by AtlasBarfed »

tsunamifury wrote: post #57

On a related note in the sports car community its been interesting to watch Acceleration stop being a mark of a performance car. There is even a lot of chatter around this being the end of the supercar segment since there are family wagons that can now do 2 second 0-60 runs. On top of that the speed is now too much for anyone to reasonably use off a drag strip or circuit. Now there is a huge emphasis on engagement, d…

Strangely, acceleration seem to stop mattering when EVs took it over.

Suddenly, ICE heads started extolling the sensory virtues of the combustion engine.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#197

Post by onychomys »

alwaysrunning wrote: post #142

As someone who grew up racing go karts and still enjoys motor sports (mostly F1), the problem I have with e-racing is the lack of sound. The winding noise they make just isn't adequate and really puts me off to the racing.

On the other hand, the Formula-E cars sound exactly like TIE Fighters, and that's awesome.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#199

Post by rnk »

itishappy wrote: post #138
js2 wrote: post #68

Impressive but for reference, about half the acceleration of a Top Fuel dragster, which are also still getting faster. Here's Brittany Force who holds the current records (fastest time, fastest speed): https://www.nhra.com/news/2022/brittany-force-sets-national-... 0 to 338.43 mph in 3.665 seconds over 1000 feet. (The cars got too fast for 1,320 feet and have been racing 1000 feet since 2008.)

Electric: 0-60mph in ~0.9s Top Fuel: 0-60mph in ~0.4s Wow.

Electric: 0-60mph in ~0.9s Top Fuel: 0-60mph in ~0.4s

That's students though, students at ~0.9s! Wow.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#200

Post by papa-whisky »

itishappy wrote: post #138
js2 wrote: post #68

Impressive but for reference, about half the acceleration of a Top Fuel dragster, which are also still getting faster. Here's Brittany Force who holds the current records (fastest time, fastest speed): https://www.nhra.com/news/2022/brittany-force-sets-national-... 0 to 338.43 mph in 3.665 seconds over 1000 feet. (The cars got too fast for 1,320 feet and have been racing 1000 feet since 2008.)

Electric: 0-60mph in ~0.9s Top Fuel: 0-60mph in ~0.4s Wow.

I wonder if they'd go any faster if the rules allowed overhead cams!

Even though these cars have disastrous efficiency and need to be completely rebuilt after every run and have backwards rules that leave them using "ancient" technology, I can't help but be awed by the effectiveness of the sledgehammer approach.

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